Cellulose liquefaction in acidified ethylene glycol
Cellulose liquefaction in acidified ethylene glycol
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DOI：
10.1007/s10570-009-9288-y
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发表时间：
2009-06-01
期刊：
影响因子：
5.7
通讯作者：
Strlic, Matija
中科院分区：
文献类型：
--
作者：
Jasiukaityte, Edita;Kunaver, Matjaz;Strlic, Matija
以木浆纤维素为原料，在乙二醇、对甲苯磺酸一水和硫酸的催化下进行了液化研究。本研究采用微晶纤维素、Whatman号滤纸。1和棉绒的摩尔质量分别为76,000、699,000和1,910,000 g mol（-1）。通过重量测定、残留纤维素的x射线衍射分析和不同时间间隔内摩尔质量下降的监测，使用粒径排除色谱法研究了这种液化。在液化的最初几分钟内，即使是摩尔质量最高的纤维素的无序区也会降解。然而，高度有序的纤维素区域在较长时间内保持相对稳定。尽管如此，还是实现了纤维素高度有序区域的部分降解。
Wood pulp cellulose was used in a study of its catalyzed liquefaction in the presence of ethylene glycol, p-toluene sulfonic acid monohydrate or sulphuric acid being the catalysts. For this study, microcrystalline cellulose, Whatman filter paper no. 1 and cotton linters with molar masses of 76,000, 699,000 and 1,910,000 g mol(-1), respectively were used. This liquefaction was studied by gravimetric determinations, by X-ray diffraction analysis of the residual cellulose and by monitoring of the molar mass decrease over different time intervals, using size-exclusion chromatography. The disordered regions, even of cellulose with the highest molar mass degraded in the initial minute of liquefaction. However, the highly ordered cellulose regions remained relatively stable for a longer time. None the less, partial degradation of the highly ordered regions of the cellulose was achieved.